COLITU LAB21 of 21 probes online

Network

AS400304 · Redoubt Networks

🇺🇸 United States · DallasDatacenter4,491 tests in 7 days
JSONAPI

Network fingerprint

What this network does to VPN traffic, read from comparing kinds of tests. “Observed” means the measurements are consistent with the behaviour — not proof of intent.

Network classification

Hysteria2Available
VLESS RealityDegraded
VLESS XHTTPAvailable
TrojanAvailable
ShadowsocksAvailable
Server ports (plain TCP)99.9%

Observed behaviour

Server addresses unreachable (IP or port blocking)Share of plain TCP connections to the servers' ports that failed. Measured: 0.1% failed over 1,940 tests.Not observed
TCP transports fail although the port answersTunnel failure rate of TCP transports minus the failure rate of plain TCP connects to the same ports. A gap points at inspection of the traffic, not at blocked addresses. Measured: a gap of 1.4 points over 1,940 tests.Not observed
QUIC/UDP transports fail more often than TCP onesFailure rate of Hysteria2 (QUIC over UDP) minus that of the TCP transports to the same servers. Measured: a gap of 0.0 points over 485 tests.Not observed
Plain DNS over UDP to public resolvers disruptedFailure rate of DNS queries over UDP minus the same queries over TCP to the same public resolvers. Measured: a gap of 0.0 points over 36 tests.Not observed
HTTPS to neutral websites fails without a VPNFailure rate of direct HTTPS requests to well-known neutral sites. Shows whether the network itself works when tunnels fail. Measured: 0.0% failed over 54 tests.Not observed

Basis

Samples4,491
Window7 days
Last updated1 h ago

How each line is computed: methodology.

Transports

Tunnel tests from this network over the last 7 days.

TransportSuccessMedian connectTestsStatus
Hysteria2100%449 ms485Available
VLESS Reality96.3%608 ms485Degraded
VLESS XHTTP99.6%616 ms485Available
Trojan99.4%611 ms485Available
Shadowsocks99.0%450 ms485Available

Success over time

JSONAPI
0%25%50%75%100%4 Oct6 Oct8 Oct10 Oct
Data table
Time (UTC)Hysteria2VLESS RealityVLESS XHTTPTrojanShadowsocks
10 Oct, 06:00–08:00 UTC100% (13)100% (13)100% (12)92.3% (13)100% (13)
10 Oct, 08:00–10:00 UTC100% (162)96.3% (161)98.8% (162)100% (161)99.4% (161)
10 Oct, 10:00–12:00 UTC100% (161)96.3% (161)100% (161)100% (162)98.8% (162)
10 Oct, 12:00–14:00 UTC100% (149)96.0% (150)100% (150)98.7% (149)98.7% (149)

Detected changes

No changes detected on this network.

Vantage points on this network

Dallas (datacenter)
since 10 Oct 2026, 07:56 UTC
4,491
measurements
Online